CSS溢出-x：可见； 和溢出-y：隐藏； 导致滚动条问题

Question

Suppose you have some style and the markup:

 ul { white-space: nowrap; overflow-x: visible; overflow-y: hidden; /* added width so it would work in the snippet */ width: 100px; } li { display: inline-block; }

 <div> <ul> <li>1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> <li>6</li> <li>7</li> <li>8</li> <li>9</li> <li>1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> <li>6</li> <li>7</li> <li>8</li> <li>9</li> <li>1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> <li>6</li> <li>7</li> <li>8</li> <li>9</li> </ul> </div>

When you view this. The <ul> has a scroll bar at the bottom even though I've specified visible and hidden values for overflow x/y.

(observed on Chrome 11 and opera (?))

I'm guessing there must be some w3c spec or something telling this to happen but for the life of me I can't work out why.

JSFiddle

UPDATE:- I found a way to achieve the same result by adding another element wrapped around the ul . Check it out.

Answer 1

After some serious searching it seems i've found the answer to my question:

from: http://www.brunildo.org/test/Overflowxy2.html

In Gecko, Safari, Opera, 'visible' becomes 'auto' also when combined with 'hidden' (in other words: 'visible' becomes 'auto' when combined with anything else different from 'visible'). Gecko 1.8, Safari 3, Opera 9.5 are pretty consistent among them.

also the W3C spec says:

The computed values of 'overflow-x' and 'overflow-y' are the same as their specified values, except that some combinations with 'visible' are not possible: if one is specified as 'visible' and the other is 'scroll' or 'auto', then 'visible' is set to 'auto'. The computed value of 'overflow' is equal to the computed value of 'overflow-x' if 'overflow-y' is the same; otherwise it is the pair of computed values of 'overflow-x' and 'overflow-y'.

Short Version:

If you are using visible for either overflow-x or overflow-y and something other than visible for the other, the visible value is interpreted as auto .

Answer 2

another cheap hack, which seems to do the trick:

style="padding-bottom: 250px; margin-bottom: -250px;" on the element where the vertical overflow is getting cutoff, with 250 representing as many pixels as you need for your dropdown, etc.

Answer 3

I originally found a CSS way to bypass this when using the Cycle jQuery plugin. Cycle uses JavaScript to set my slide to overflow: hidden , so when setting my pictures to width: 100% the pictures would look vertically cut, and so I forced them to be visible with !important and to avoid showing the slide animation out of the box I set overflow: hidden to the container div of the slide. Hope it works for you.

UPDATE - New Solution:

Original problem -> http://jsfiddle.net/xMddf/1/ (Even if I use overflow-y: visible it becomes "auto" and actually "scroll".)

#content {
    height: 100px;
    width: 200px;
    overflow-x: hidden;
    overflow-y: visible;
}

The new solution -> http://jsfiddle.net/xMddf/2/ (I found a workaround using a wrapper div to apply overflow-x and overflow-y to different DOM elements as James Khoury advised on the problem of combining visible and hidden to a single DOM element.)

#wrapper {
    height: 100px;
    overflow-y: visible;
}
#content {
    width: 200px;
    overflow-x: hidden;
}

Answer 4

I've run into this issue when trying to build a fixed positioned sidebar with both vertically scrollable content and nested absolute positioned children to be displayed outside sidebar boundaries .

My approach consisted of separately apply:

• an overflow: visible property to the sidebar element
• an overflow-y: auto property to sidebar inner wrapper

Please check the example below or an online codepen .

 html { min-height: 100%; } body { min-height: 100%; background: linear-gradient(to bottom, white, DarkGray 80%); margin: 0; padding: 0; } .sidebar { position: fixed; top: 0; right: 0; height: 100%; width: 200px; overflow: visible; /* Just apply overflow-x */ background-color: DarkOrange; } .sidebarWrapper { padding: 10px; overflow-y: auto; /* Just apply overflow-y */ height: 100%; width: 100%; } .element { position: absolute; top: 0; right: 100%; background-color: CornflowerBlue; padding: 10px; width: 200px; }

 <p>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?</p> <div class="sidebar"> <div class="sidebarWrapper"> <div class="element"> I'm a sidebar child element but I'm able to horizontally overflow its boundaries. </div> <p>This is a 200px width container with optional vertical scroll.</p> <p>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?</p> </div> </div>

Answer 5

There is now a new way of addressing this issue - if you remove position: relative from the container which needs to have the overflow-y visible, you can have overflow-y visible and overflow-x hidden, and vice versa (have overflow-x visible and overflow-y hidden, just make sure the container with the visible property is not relatively positioned).

See this post from CSS Tricks for more details - it worked for me: https://css-tricks.com/popping-hidden-overflow/

Answer 6

For my use case, adding overflow-x:visible; overflow-y:clip overflow-x:visible; overflow-y:clip onto the div that has the overflow seems to give me the desired effect of hiding overflow on the Y axis while not giving me a scrollbar on the X axis (i have a carousel slider that was loading images full-size before scaling them back down again, and these images were taking up 75% of the page height on load, hence wanting no overflow-y ).

No parent wrapper div was needed, just a fixed height set on the overflowing element. I realise this solution may not work for everyone, but it could certainly help some.

Answer 7

I used the content + wrapper approach... but I did something different than mentioned so far: I made sure that my wrapper's boundaries did NOT line up with the content's boundaries in the direction that I wanted to be visible .

Important NOTE: It was easy enough to get the content + wrapper, same-bounds approach to work on one browser or another depending on various CSS combinations of position , overflow-* , etc., but I never could use that approach to get them all correct (Edge, Chrome, Safari, etc.).

But when I had something like:

 #hack_wrapper { position:absolute; width:100%; height:100%; overflow-x:hidden; } #content_wrapper { position:absolute; width:100%; height:15%; overflow:visible; }

 <!-- #hack_wrapper div created solely for this purpose --> <div id="hack_wrapper"> <div id="content_wrapper"> ... this is an example of some content with far too much horizontal content... like, way, way, way too much content. </div> </div>

... all browsers were happy.

Answer 8

I was facing the same issue, the following solution worked (styles are applied to the parent block)

overflow-y: visible;
overflow-x: clip;

Answer 9

A small "hack" that works very well if you only want the first row visible (but still need overflow):

set gap really high so you are sure the second row is pushed out of the screen - eg:

gap: 10000rem;

It is really hacky but works great for something like a desktop nav with menus that need to overflow...